Improvement in anti-friction bearings



C. B. SHELDON.

ANTI-FRICTION BEARINGS.

Patented Jan. 4, 1876 M PETERS, FHOTO-UTNOGRAPKER. WASHINGTON, D. C.

@ UNITED v STATES PATENT OFFIoa OEVEDRA B SHELDON, OF NEW YORK, N. Y.

IMPROVEMENT IN ANTIY- FRICTION BEARINGS.

Specification forming part of Letters Patent No. 17 1,87 1. dated January 4, 1876; application-filed November 19, 1875.

sheet or thin cast-metal plate,'of suitable size.

and form to suit the journal or otherobject to which it is to be applied, with holes punched 0r otherwiseforme'd in it; or it may be a piece of strong woven wire bent into theform required, to which'the plumb-ago, being made plastic by the cement, is applied. on one or both sides, and then subjected to pressure suflicient to condense it properly, and to fill the openings and unite the coatings of both sides, so as to firmly nttach and'secure the plumbago to the foundation-metal, and thus make substantial and practical linings for journal-boxes, the said linings being of greater or less thickness, according to the sizes of the bearings and the serviceto which they are subject.

Figures 1 and 2 are end'elevations of journal-bearings provided with linings of my invention, and Figs. 3 and 4 are plan views of foundation-plates of difl'erent kinds.

Similar letters of reference indicate correspondin g parts.

A represents bearings or box-linings, the foundation-plates of which are of woven Wire, B, and 0 represents the same made on an open cast-metal plate, 1).

The essential idea of the invention isto combine the plumbago with a strong support ing medium capable of maiptaining it in suit} able form and condition for machinery-bearin gs, the difficulty being to make it sufliciently compact, hard, and unyielding to prevent displacement of the particles by the. rubbing action of thejournals, 85c. v

The open or perforated metal plate or wovenwire foundation which I propose oflers the best possible means cheaply attainable for this purpose, and with a good paste of flour, or rubber cement, and adequate pressure, the

plumbago is made to adhere with sufficient solidity and tenacity to insure success.

7 I am aware that plumbago has been used with vegetable or animalfiber by means of soda, potash,'0r other size, and also with parafline, burnt hair, and ivory-dust; but

What I claim is Plastic plumbago compressed into the interstices-of metal to forman anti-friction hear- Witnesses:

JAMES H. HUNTER, ALEX. F. ROBERTS. 

